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221358-52-7

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221358-52-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221358-52-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,5 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 221358-52:
(8*2)+(7*2)+(6*1)+(5*3)+(4*5)+(3*8)+(2*5)+(1*2)=107
107 % 10 = 7
So 221358-52-7 is a valid CAS Registry Number.

221358-52-7Downstream Products

221358-52-7Relevant articles and documents

Asymmetric epoxidation of α,β-unsaturated ketones catalyzed by rare-earth metal amides RE[N(SiMe3)2]3with chiral TADDOL ligands

Shan, Haiwen,Lu, Chengrong,Zhao, Bei,Yao, Yingming

, p. 1043 - 1053 (2021/01/25)

The catalytic asymmetric epoxidation of α,β-unsaturated ketones by tert-butylhydroperoxide (TBHP) has been well established using rare-earth metal amides RE[N(SiMe3)2]3 (RE = La(1), Nd(2), Sm(3), Y(4), Yb(5)) with chiral TADDOL ligands. It was found that

Lanthanide complexes combined with chiral salen ligands: Application in the enantioselective epoxidation reaction of α,β-unsaturated ketones

Xia, Xuexiu,Lu, Chengrong,Zhao, Bei,Yao, Yingming

, p. 13749 - 13756 (2019/05/16)

Readily available lanthanide amides Ln[N(SiMe3)2]3 (Ln = Nd (1), Sm (2), Eu (3), Yb (4), La (5)), combined with chiral salen ligands H2La ((S,S)-N,N′-di-(3,5-disubstituted-salicylidene)-1,2-cyclohexan

Kinetic resolution of 2,3-epoxy 3-aryl ketones via catalytic asymmetric ring-opening with pyrazole derivatives

Huang, Tianyu,Lin, Lili,Hu, Xiaolei,Zheng, Jianfeng,Liu, Xiaohua,Feng, Xiaoming

supporting information, p. 11374 - 11377 (2015/08/18)

A highly efficient catalytic kinetic resolution of 2,3-epoxy 3-aryl ketones via asymmetric ring-opening with pyrazole derivatives has been achieved by using a chiral N,N′-dioxide-Sc(III) complex as the catalyst. A wide variety of substrates were readily scoped, and the selectivity factors obtained were excellent (up to >300).

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